Transaction not yet indexed

5z21pEKjhV8rXRuzrkMPtSokGAUKq7GRrrnvYnRfP6BtcUK3grNQeZHqveMqabbPvjoZRPCR6MoHDTgcUsZ8AHE4

The transaction signature is valid but not yet indexed by this RPC node, or the transaction failed before inclusion.